Chapter 15, Problem 15.9QP

(a)

Interpretation Introduction

Interpretation:

The equilibrium expression for the given reaction has to be written

Concept Introduction:

Chemical equilibrium: The term applied to reversible chemical reactions. It is the point at which the rate of the forward reaction is equal to the rate of the reverse reaction. The equilibrium is achieved; the concentrations of reactant and products become constant.

${\text{Q}}_{\text{c}}$ and ${\text{K}}_{\text{c}}$: Q is the reaction quotient, defined as the ratio of products concentrations to reactant concentration. ${\text{K}}_{\text{c}}$ is the equilibrium constant, defined as the ratio of products concentrations to reactant concentration at equilibrium.

(b)

Interpretation Introduction

Interpretation:

The value of equilibrium constant for the given reaction has to be determined.

Concept Introduction:

Chemical equilibrium: The term applied to reversible chemical reactions. It is the point at which the rate of the forward reaction is equal to the rate of the reverse reaction. The equilibrium is achieved; the concentrations of reactant and products become constant.

${\text{Q}}_{\text{c}}$ and ${\text{K}}_{\text{c}}$: Q is the reaction quotient, defined as the ratio of products concentrations to reactant concentration. ${\text{K}}_{\text{c}}$ is the equilibrium constant, defined as the ratio of products concentrations to reactant concentration at equilibrium.